Apparatus for indicating and determining the point of entrance of fluids in boreholes



Jan. V29 1929.

A W. MEINDERSMA 4APPARATUS FOR INDICATI-NG AND DETERMINING THE PO'INT Luau/far.' ,l

Wzjef malin/gerannt Fil'ed Oct. 20, 1927 0F ENTRANCE OF FLUIDS IN BOREHOLES v. e-Ilv I atented Jan. 2.9, 19279. Y

' v A.Plnza'rus. FOB INDICATING AND DETERMINTNG THE rom'r rLUms 1N BOBEHOLES.

UNITED STA mean imm'nnnsiu, or WASSENAAR, NETHERLANDS.

Application area october zo, 1921, serial no. c2758?, and infini, nethefmnas october zo, 1924.

This invention relates to a device for indibase memberv which is attached to the lowen eating and determining the fluids in a boreend of a shaft 11, the upper end of which hole and particularly to a device which by its own actiomproducesanelectriccurrentwhlch, amplified or not, may be conveyed through telephone receivers or may be employed for b erating recording devices, loud speakers or Vtllie like.

According to the invention. this object is attained .by providing the device with two spaced `propellers which may be set in motion by means ofilowing fluids and which are as- 1 sociated with a coil and a-magnetic field in such a manner that a'variation in the rela-- tive motion between said propellers due to a difference in the speed with which the Huid flows along the said propellers produces an induction current which may be detected by 'Y that, `together with the fluid in the bore-hole, f they a telephone receiver.- The propellers may be replaced by other propellers corresponding with the diameter of the'bore hole or the casing. Finally,the device may be provided with two cartridges of a composition such constitute a galvaniccell in which a changeof the fluid causes variations inthe 1 electromotive force,'which variations may be Y dat its to detected by means of a telephone receiver.

In manner a simple mechanical device is obtained for examining the entry of fluids into a bore-hole and for determining thel nature of the said fluids.` f

An embodiment of the invention is illus# tratedV in the accompanying drawing, in which; Y VFigure 1 is a longitudinal sectional view of the improved device or implement j.

Fig. 2 is abottom view thereof; Fig.,3sl1ows a detail of Fig.v lon Van enlarged scale; Y Y. y Fig. ltis adiagram of the wiring. Referring more particularly to Fig. 1, the device or implement is' represented as com. prising three Amain parts a, b and c which are a 'coupled` togetherv .by -pairs .of oppositely` `curved, spider-like members 5 and 6 having inter-engaging. shouldered edges; the upper part Ya being formed with a=.bore through which the two conductors orleads 1 and 2 are Yinserted,aud carrying a suspension memberV The middle part t consists of two independently-rotatable units, .one comprising e two series-connectedcoils 28 (best shown 1n FW`' Figrlwound on cores 17 carried by a series.

has a propeller 3 secured to it; while the other unit comprises a permanent magnet 18, va carrier 16 therefor fixed to the upper end of a shaft 12, and a propeller 4C" attached to the lower end ofthe latter shaft. The propellers 3 and 4 are disposedwithin the double spiders 5, 6 and have a diameter such that their blades project beyond the body of the implement. y

Finally, the lower part c is formed with two concentric compartments 19 and 22 adapted to receivel substances in suitable form whichoncoming in contact with water, either salt or fresh, will constitute a galvanic cell and sd'generate an electric curentwhich is'condcted through the lead 2. The substance contained in the ,inner compartment 22 is shown as in the form of a cartridge, deslgnated 21, which is forced downward by`a Y l 1,700,642," T'Es PATIENT OFFICE oF ENTRANCE or spring '20 (Fig. 1) into a central'pocket Ior recess 25 provided in a head 26 that is secured vto the lower end of parte; said head being also provided Ywith apertures 23, 24 and 27 for admission of water to recess 25, the aper tures 23 and 24 registering with openings `releasing compound, such as lead peroxide .(PbOQ, for the positive pole. One of said substances-in the. construction illustrated, theV cartridge 21-is electrically connected formed in the bottom of compartment 19. In

as an electrolyte to bridge the Vsame and therewith the conductor or lead 2 through the. in v termediary of .spring 20, andis insulated from the body of the device or implement itself, while the other substance is grounded through the implement and the metalhoisting Acable (not shown) from which said implement isfsuspended by means of the part or member (l.

V'As previousl stated, the coils 28 carri-edd by the cores -1 (Fig. 3) are/connected in 11, andthe latter is provided with a slipring 32 which is engaged by a. brush 29 whereto theV other main conductor or ,lead 1 is at,-

Thefree end of one coil is connected Vat 30 to the base member 15 secured to shaft Tuo n .tached The terminal 30 is grounded '-r through base 15, the body of the implement and the metal suspension cable mentioned above, and the slip-ringBQ is suitably insulated from shaft 11 and has connected to it the other; terminal 31 of the coil. In consequence, a relative rotary motion between the two propellers 3 and 4 will produce a similar movement between the coils 28 and the permanent magnet 18, and'that, in turn, will generate an electric current'l in said coils, which is collected by brush 29 and conveyed through lead 1. Instead of the permanent magnet, however, current generators .of other types can be used; for instance, a microphone, in which the relative movement of the propellcrs 3 and 4p1oduces a vibration of thc diaphragm of the microphone, thereby actuating a telephone included in the circuit.

, -Fig 4 shows diagrammatically the passage of the current; that produced in the coils 28, whichlatter are indicated therein as a gen# erator, fiowing through lead 1 and telephone l33 to ground, while the current generated by the galvanic cell passes through lead 2 and telephone 34 to ground. Both telephones may, if desired, be united to form a double head-set; but other suitable current indicating or currentrecording apparatus may be used in place of telephones.

In operation, the implement is lowered into a casing or bore-hole filled with liquid, during which time the t'wo propellers 3 and 4 will be rotated at'the same speed, with the result that no current is generated. Vhen,

however, a point is passed where liquid is en-v tering the hole or casing, then the flow of the liquid through the upper propeller 3 will be more intense than through the lower propeller 4, and a relative rotation between the two will then take place, with the result that current is generated in circuit 1 in the manner above explained. Any point or zone of entrance of liquid into the bore-hole may in this way be determined, since the depth is known from the unwound cable. The two poles con stituted by the substances in compartments 19 and 22 will form a galvanic cell only when experience being enabled to ascertain readily.

what takes place in the bore-hole. It will be apparent. however, that the invention as described above, is not restricted to use in boreholes but may also be applied as a measuring instrument to any kind of tube system.

What I claim is:

1. An implement to indicate the entry of liquids into abore-hole, comprising a body adapted to be lowered into the bore-hole; a pair of spaced propellers carried b ysaid body to be set in motion by the flow o liquids in the bore-hole and capable of independent relative rotation; cooperating means carried by the two propellers :for setting up an induced current consequent upon such rotation;

and conducting means for leading such cur' WIGGER MEINDERSMA. 

